Truck step



FIG. 1 is a top plan view of the truck step;

FIG. 2 is a front elevational view of the truck step;

FIG. 3 is a left side elevational view of the truck step;

FIG. 4 is a right side elevational view of the truck step;

FIG. 5 is a bottom plan view of the truck step; and,

FIG. 6 is a rear elevational view of the truck step. 

The ornamental design for a truck step, as shown and described. 